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Legislators › Senate

Sen. Mike Zimmer

Democrat · Senate District 35 · Clinton

In office since 2025

Get their floor votes and new bills they sponsor. Votes against their party come right away.

mike.zimmer@legis.iowa.gov

Official profile
528
floor votes cast
2%
of votes missed (12)
94%
voted with their party’s majority · broke with it 31 times
113 of 141
party-line votes with their party (when the two parties split)

3 of their 31 breaks with their party came on bipartisan votes, where most of both parties voted the same way, so they don’t count against the party-line record.

Votes most like

How often they voted the same way (yes or no) as each Senate colleague in the 2026 session. How it’s worked out

Closest across the aisle: Charlie McClintock (R), 84%.

Lobbying groups they vote with

Sen. Mike Zimmer’s contested votes in the 2026 session, compared with the sides 80 organizations registered on those bills.

Each legislator’s last floor vote on a bill is compared with the side the organization registered on it (its latest declaration; undecided doesn’t count). Only contested votes count, where at least a tenth of the chamber voted the other way, since most bills pass nearly unanimously. A vote on an amended bill may not be the version that was lobbied. Organizations with fewer than 3 such votes aren’t listed. Lining up with a group doesn’t mean it swayed the vote.

Recent votes

All 540 votes →

Votes against their party

  • HF 2801 A bill for an act modifying the major economic growth attraction program, and including effective da…
    October 2, 2026 · voted yes; Democrats voted 2–13 · Roll call
    Yes
  • HF 2787 A bill for an act prohibiting warrant resolution clinics, including enforcement mechanisms, providin…
    May 3, 2026 · voted yes; Democrats voted 2–11 · Roll call
    Yes
  • HF 2770 A bill for an act relating to and making appropriations to the justice system, providing fees, and i…
    May 2, 2026 · voted yes; Democrats voted 1–14 · Roll call
    Yes
  • HF 2781 A bill for an act relating to allocations of moneys from the juvenile detention home fund. (Formerly…
    May 2, 2026 · voted yes; Democrats voted 6–8 · Roll call
    Yes
  • SF 654 A bill for an act relating to wildlife, including the treatment of beaver dams, identification for t…
    May 2, 2026 · voted yes; Democrats voted 2–12 · Roll call
    Yes
  • SF 2218 A bill for an act relating to state regulatory compliance and eligibility requirements, including by…
    April 28, 2026 · voted yes; Democrats voted 6–10 · Roll call
    Yes
  • SF 2299 A bill for an act relating to the district-to-community college sharing or concurrent enrollment pro…
    April 21, 2026 · voted yes; Democrats voted 4–12 · Roll call
    Yes
  • HF 2591 A bill for an act relating to open enrollment, student transfers, and interscholastic athletic eligi…
    April 14, 2026 · voted no; Democrats voted 13–4 · Roll call
    No
  • SF 2286 A bill for an act relating to the investment of public funds, and making penalties applicable. (Form…
    April 8, 2026 · voted yes; Democrats voted 6–9 · Roll call
    Yes
  • HF 2706 A bill for an act relating to judicial officers, including magistrate appointments in judicial elect…
    April 7, 2026 · voted no; Democrats voted 13–2 · Roll call
    No
  • SF 2207 A bill for an act relating to the submission of proposed legislation by the governor and state depar…
    April 6, 2026 · voted yes; Democrats voted 1–15 · Roll call
    Yes
  • HF 2527 A bill for an act providing a limitation on civil or criminal liability for any alleged actual or po…
    March 24, 2026 · voted yes; Democrats voted 3–12 · Roll call
    Yes
  • SF 2434 A bill for an act relating to local government, including the approval of action by ordinance, and i…
    March 10, 2026 · voted yes; Democrats voted 2–14 · Roll call
    Yes
  • SF 2404 A bill for an act requiring the department of education to develop and administer a pilot program th…
    March 10, 2026 · voted yes; Democrats voted 3–13 · Roll call
    Yes
  • SF 2466 A bill for an act relating to veterans services and making appropriations.(Formerly SF 2282 , SSB 30…
    March 10, 2026 · voted yes; Democrats voted 7–10 · Roll call
    Yes
  • HF 2215 A bill for an act relating to natural resources, including office locations of the director of natur…
    March 9, 2026 · voted yes; Democrats voted 3–13 · Roll call
    Yes
  • SF 2378 A bill for an act relating to the ability of property owners to protest proposed changes in zoning d…
    March 2, 2026 · voted yes; Democrats voted 7–8 · Roll call
    Yes
  • SF 2430 A bill for an act relating to the display of flags at half-staff on public buildings. (Formerly SSB …
    February 25, 2026 · voted yes; Democrats voted 7–9 · Roll call
    Yes
  • SF 2203 A bill for an act relating to the verification of United States citizenship of persons registering t…
    February 25, 2026 · voted yes; Democrats voted 3–13 · Roll call
    Yes
  • SF 2299 A bill for an act relating to the district-to-community college sharing or concurrent enrollment pro…
    February 24, 2026 · voted yes; Democrats voted 1–16 · Roll call
    Yes
  • SF 2263 A bill for an act relating to the carrying, transportation, and possession of weapons, and including…
    February 24, 2026 · voted yes; Democrats voted 6–10 · Roll call
    Yes
  • SF 2039 A bill for an act providing for intervention by members of the general assembly in proceedings for j…
    February 23, 2026 · voted yes; Democrats voted 6–11 · Roll call
    Yes
  • HF 711 A bill for an act relating to the practice of barbering and cosmetology arts and sciences, including…
    May 14, 2025 · voted no; Democrats voted 8–6 · Roll call
    No
  • SF 383 A bill for an act relating to pharmacy benefits managers, pharmacies, prescription drugs, and pharma…
    April 28, 2025 · voted yes; Democrats voted 5–11 · Roll call
    Yes
  • HF 706 A bill for an act relating to open meetings and open records, providing penalties, and making penalt…
    April 17, 2025 · voted yes; Democrats voted 2–13 · Roll call
    Yes
  • HF 860 A bill for an act prohibiting state and local regulations on fuel-powered equipment based on the equ…
    April 8, 2025 · voted yes; Democrats voted 6–8 · Roll call
    Yes
  • HF 309 A bill for an act relating to the review by the department of inspections, appeals, and licensing of…
    April 8, 2025 · voted yes; Democrats voted 5–9 · Roll call
    Yes
  • SF 608 A bill for an act regulating the marketing of grain, by providing for fees paid by grain dealers and…
    April 7, 2025 · voted yes; Democrats voted 6–8 · Roll call
    Yes
  • SF 595 A bill for an act related to the regulation of construction, including state building codes, contrac…
    March 25, 2025 · voted yes; Democrats voted 3–12 · Roll call
    Yes
  • SF 473 A bill for an act relating to certain sincerely held religious or moral beliefs of certain entities …
    March 25, 2025 · voted yes; Democrats voted 1–14 · Roll call
    Yes
  • SF 175 A bill for an act incorporating provisions related to pregnancy and fetal development into the human…
    February 18, 2025 · voted yes; Democrats voted 1–13 · Roll call
    Yes